Traction device for vehicle wheels



March 8, 1927.

L. GUERRINI TRACTIONDEVICE F'OR VEHICLE WHE u-s Original Filed Jan.12. 1921 2 Sheets- Sheet 1 March s, 1927.

. 1,620,460 L. GUERRINI TRACTION DEVICE FOR VEHICLE WHEELS OriginalFiled Jan12. 1921 'ZSheet s-SheBtZ fimfizfar I .Z' m x W 770/21 traction shoes and tire blocks attached there- I Patented Mar. 8, 1927.

UNITED STATES PATENT OFFICE.

LUIGI GUERRIN'I, OF MILAN, I ITALY, ASSIGNOR TO SOCIETE ANONYME DES DIS- POSITIFS D'ADHERENCE GUERBINI, 0F PARIS, FRANCE, A FRENCH SOCIETY.

TRACTION DEVICE FOR VEHICLE WHEELS.

Original application 'filed January 12, 1921, Serial No. 436,752, and in Italy April 16, 1918. Divided and this application filed April 17, 1922, Serial No; 554,175. Renewed March 29, 1926.

(enema unnnn'rnn PROVISIONS or THE ACT or MARCH 3, 1921/41 screw. 1. 131a) This invention relates to wheels for vehicles and is a division of my application No. 436,752, for vehicle wheels, filed January 12, 1921. a

The main object of the invention is to provide a traction belt for vehicles wheels adapted to carry the adhesion shoes which are disclosed in my Italian Patent No. 165,- 775 of Apr. 16, 1918.

A further object oflthe invention is to so vconstruct the belt that it may, within certain limits be applied to a wheel of any diameter having solid or pneumatic, single or double tires and which, after being so' applied, may have its length reduced so as to cause it to closely engage the periphery of such wheel, V

With the above and other objects in view,

my invention consists in the improved traction belt illustrated in the accompanying drawings, described in the following specification, and particularly claimed, and in such variations and modifications thereof as willbe. obvious to those skilled in the art to which my invention relates.

In the drawings accompanying and form ing a part of this specification, and wherein the preferred embodiment of my invention is illustrated: I I Figure 1 is a side elevation ofa wheel equipped with the adhesion belt embodying my invention.

Figure 2 is an end elevation of the wheel shown. in Figure 1.

Figures 3 and 4 are, respectively, a side and a plan view of the traction belt removed from the wheel and spread out in a. longitudinal position.

Figures 5 and 6 are respectively, a side and .a' lan view of some of the elements of the elt, said elements being connected by means of a turn-buckle Lu the adjacent similar elements.

Figures 7 and 8 are, respectively, a side and a plan view of the said parts having Referring in defiil to the several figures, the reference character 1) represents the tire of a vehicle wheel,around the periphery of which the belt is tightened, upon which belt are loosely mounted the traction shoes a of suitable material and shape, each of said shoes having cross-ribs on its ground-engaging face and. a pair of lugs 2 extending from its opposite face, These lugs a are each provided with a substantially triangular slot. of which triangular slot the sides are united by arcs of circles, as described and claimed in my aforementioned Italian :parts comprising rigid links it hingedly joined by the hinge pins is. The free end of one ofthese links it is hingedly connected to a hook I. The free end of the other link It is hingedly connected to one of the threaded members of a turn-buckle i,

of which the other threaded member carries The book Z of one link 71, of each rotation of the patent. These slots make it possible to supof said belt parts engages with the eye 3' v of the turn-buckle associated with a link of the adjacent belt part. A suflicient number of belt parts is provided to extend around the periphery of the wheel.

The turn buckles make it possible to vary the length of the belt according to the diameter of the wheel to which it must be applied and to secure it'thereon.

Each of the hooks'Z has a widened bifurcated portion 8 to receive an end of oneof the end links it and the opposite end of said link has a similar widened bifurcated portion to receive one end of the adjacent link h.- The opposite end of the latter link has a similar widened bifurcated portion to receive an endof one of the threaded members of the turn buckle. i. The hingepins k extend through the bifurcations of the widened portions 8 and the parts associated therewith to form the hinge 'oints between one end link and the hook between the opposite end link and a threaded portion of pression fitting the turn buclile z, and between the intermediate and end links,

Upon each'of the widened portions 8. is

' secured a block m which extends transversely of the belt, and each of these blocks at its opposite ends is provided with projecting plns 0 and p which pass through the triangular slots of the lugs a? of the traction shoes at and aiford means from which said shoes are suspended. The blocks m are shaped to suit the periphery of thevtire or tires of the wheel. If the tire is of the single type the blocks will each have a dethe periphery of said tire. Should the tire be of the double type, each of the blocks will be formed with a pair of correspondin adjacent depressions-and with I a web shape to extend into'the groove between-the two ened.

The construction of the belt whereby it may be readily separated into a plurality of parts makes it easy to mount said belt upon the wheel and to remove it from the wheel.

The tightening of the belt upon the tire will prevent the relative displacing of the belt with respect'to the periphery of the tires, but in special cases it may be desirable to provide bolts .2 which are suitably fixed to one or more blocks m and which pass through radial apertures in the wheel rim to secure said bolts in place by means of the nuts to shown in Figure 3.

It will be understood that various changes may be made in the form and relation of parts to suit different environments, and that the invention is not intended to be limited to the precise details of construction and artires when the belt is tightran ement shown;

up of a plurality of hingedly connected 43 links, members extending transversely of the links having pivot pins extending beyond their sides, traction shoes, and ears extending; from said shoes and having mixtilinear slots to receive said pivot pins.

2. An easily removable tractive device adapted to be applied and tightened upon vehicle wheels of different sizes, comprising a belt made up of a plurality of parts, each of said parts comprising a series of hingedly connected members, and connecting parts of variable lengths carried by the free end membersof each of said series of members for connecting the parts of said belt together and serving to vary the length of the belt and also to stretch said belt upon the wheel, a series of traction members .mounted, re-

spectively, on said hingedly-connected memhers, one of said series of members havin mixtilinear holes andthe other series 0 members carrying pins cooperating with said holes for loosely attaching the traction members to the belt and 'for cogging the connecting said shoes to the blocks and for permitting the cogging of the wheel with said shoes as said shoes are successively laid upon the ground.

In testimony whereof I have hereunto set my hand.

--LU IG I.GUERRI NI. 

